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Segantii insider trading trial heads towards conclusion in Hong Kong

Reported by Hedgeweek
Oct 7, 2026· 3 min read
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Key Takeaways
  • • Segantii Capital Management founder Simon Sadler, former trader Daniel La Rocca, and the hedge fund itself are concluding a high-profile insider trading trial in Hong Kong centered on June 2017 trades in Esprit Holdings shares allegedly made on confidential information about Lone Pine Capital's planned share sale.
  • • Prosecutors allege that Sadler and La Rocca sold Esprit shares and established a short position worth slightly more than $1 million within hours of receiving price-sensitive information from former Bank of America trader Tony Psarianos about an unnamed shareholder's plan to sell at least 190 million shares.
  • • The prosecution's case rests on recorded communications, emails, and witness testimony establishing that there was no legitimate business rationale for the trades other than access to confidential information about Lone Pine's 10% stake disposal—a transaction representing over 60 times the stock's average daily volume.
  • • Sadler has maintained the short position was part of routine inventory management and based on independent research assessing Esprit's position as "lazy, stale"; defence closing arguments are expected this week, with a verdict to follow at a later date.
  • • The case threatens the reputation of Segantii, which Sadler founded in 2007 with $26 million and grew into one of Asia's leading multi-strategy hedge funds managing over $6 billion at its peak.
Summary
The insider trading trial of Segantii Capital Management founder Simon Sadler is nearing completion in Hong Kong following more than a month of proceedings. Prosecutors delivered closing arguments asserting that evidence presented throughout the trial—including emails, recorded telephone conversations, and witness testimony—fatally undermines the defence case. The charges centre on trades executed in June 2017 involving Hong Kong-listed fashion retailer Esprit Holdings, with Sadler, former trader Daniel La Rocca, and Segantii itself facing allegations of trading on confidential information ahead of a major share sale by hedge fund Lone Pine Capital.

At the prosecution's core is testimony from Tony Psarianos, a former Bank of America trader, who allegedly informed La Rocca that an unnamed shareholder planned to sell at least 190 million Esprit shares. La Rocca subsequently identified Lone Pine as the seller and communicated this intelligence to Sadler and other Segantii employees. Prosecutors contend that Sadler and La Rocca then rapidly sold Esprit shares held by Segantii and opened a short position worth slightly more than $1 million within hours of receiving the information. The prosecution's argument centers on the absence of any credible alternative explanation for the timing and execution of these trades, given that Lone Pine's disposal represented more than 60 times the stock's typical daily trading volume.

Sadler has disputed the prosecution's characterization, testifying that he reviewed independent research on Esprit prepared by former analyst Vikki Huang and determined the firm's investment position had become "lazy, stale." He characterized the short position as routine inventory management consistent with Segantii's multi-strategy trading operations. Defence counsel are expected to deliver closing arguments within days, with a verdict to follow at a future date. Separate legal teams represent each defendant. The outcome carries significant implications for Segantii, which Sadler founded in 2007 with $26 million and developed into one of Asia's most prominent multi-strategy hedge funds, eventually managing assets exceeding $6 billion before becoming a major participant in regional equity block trades competing with firms including Marshall Wace and Jane Street.

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AlphaMaven summarised this story from the reporting below. Each link opens the original article.

Hedgeweek Segantii insider trading trial heads towards conclusion in Hong Kong